Keysight Technologies 11581A, Руководство по эксплуатации и обслуживанию

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Operating Instruction 1
Keysight 849x and 1158x Operating and Service Manual 23
3 Set the SWR meter range to 2 dB (expanded) or for the 3 dB, 6 dB, and 10 dB
(expanded) as appropriate and adjust its bandwidth to the center of the
adjustment range. Fine tune the oscillator frequency to obtain maximum meter
indication. Adjust the oscillator output to obtain the SWR meter reading in the
table below.
4 Connect the attenuator into the system, adjust the SWR meter range switch as
listed in Table 11 , and verify that the SWR meter indicates within the limits as
shown Table 11 .
Table 11 SWR verification
Attenuation (dB)
SWR meter range
(dB)
Meter indication (dB)
Minimum Actual Maximum
0 (system cal)
2 (or 10)
[a]
[a] Set SWR meter range to 10 dB and power level to 0.0 dB for 3 dB, 6 dB, and 10 dB attenuators only.
Set to 0.5 (or 0.0)
[a]
3 10 1.35 1.65
6 12 0.85 1.15
10 14 0.75 1.25
20 12 0.25 0.75
30 16 1.00 2.00
40 22 –0.25 1.25
50 26 0.75 2.25
60 32 –0.50 1.50